如何更改Popup MenuButton项目符号窗口的背景颜色? [英] How to change the background color of Popup MenuButton bullet window?

问题描述

我想更改弹出菜单按钮"窗口的背景颜色.我该怎么办?希望我能得到您的帮助.谢谢.当我更改容器的颜色时，某些角不能更改颜色.

I want to change the background color of Popup Menu Button window. What should I do? I hope I can get your help. Thank you.When I change the color of container, some corners cannot change the color.

 new IconButton(
            icon: new Icon(
              Icons.search,
              color: Colors.white,
            ),
            onPressed: () {},
          ),
          new PopupMenuButton(
            offset: const Offset(0.0, 60.0),
            icon: new Icon(Icons.add, color: Colors.white),
            itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[
                  new PopupMenuItem<String>(
                      value: '选项一的值',
                      child: new Container(
                          color: Colors.red,
                          child: new Column(
                            children: <Widget>[
                              new Row(
                                children: <Widget>[
                                  new Image.asset(defaultAvatar,
                                      width: 30.0, height: 30.0),
                                  new Text('发起群聊')
                                ],
                              ),
                            ],
                          ))),
                  new PopupMenuItem<String>(
                      value: '选项一的值',
                      child: new Container(
                          child: new Column(
                        children: <Widget>[
                          new Row(
                            children: <Widget>[
                              new Image.asset(defaultAvatar,
                                  width: 30.0, height: 30.0),
                              new Text('添加朋友')
                            ],
                          ),
                        ],
                      ))),

推荐答案

该背景色基于Theme，因此您可以更改将PopMenuButton包裹在Theme内的颜色并更改cardColor.

That background color is based on the Theme , so you can change the color wrapping your PopMenuButton inside Theme and change the cardColor.

          Theme(
                data: Theme.of(context).copyWith(
                  cardColor: Colors.red,
                ),
                child: new PopupMenuButton(
                       ...

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